From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph showing the differences in horsepower with 'Tank' air filters fitted to a Phantom II carburetter air intake.
| Identifier | ExFiles\Box 92\2\ scan0170 | |
| Date | 17th October 1933 | |
| FILE . 17.10.33 CURVES TAKEN ON UNIT BED SHOWING DIFFERENCES IN HP WITH 'TANK' AIR FILTERS FITTED TO CARBURETTER AIR INTAKE. PHANTOM II. HORSE POWER 140 130 120 110 OPEN 2 FILTERS IN PARALLEL 1 FILTER R.P.M. 2000 2500 3000 3500 COPY OF MX{John H Maddocks - Chief Proving Officer}/CH 16.X.33 E/JNR{Charles L. Jenner} | ||